Kesha performs with Johnny Depp at Petty Fest

Singer Ke$ha performs onstage singing 'Mary Jane's Last Dance' at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson) less

Singer Ke$ha performs onstage singing 'Mary Jane's Last Dance' at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty ... more

Photo: Getty Images For Jameson

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Comedian Sarah Silverman performs onstage singing 'Don't Come Around Here No More' at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson) less

Comedian Sarah Silverman performs onstage singing 'Don't Come Around Here No More' at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh ... more

Photo: Getty Images For Jameson

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Actor Johnny Depp performs as a guest guitarist onstage during the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson) less

Actor Johnny Depp performs as a guest guitarist onstage during the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images ... more

Photo: Getty Images For Jameson

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Musician Nick Valensi of The Strokes (L) and actor Johnny Depp perform onstage during the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson) less

Musician Nick Valensi of The Strokes (L) and actor Johnny Depp perform onstage during the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh ... more

Photo: Getty Images For Jameson

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Musician Patrick Carney of The Black Keys performs as a guest drummer onstage during the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson) less

Musician Patrick Carney of The Black Keys performs as a guest drummer onstage during the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh ... more

Photo: Getty Images For Jameson

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Actress Mae Whitman performs onstage at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson)

Actress Mae Whitman performs onstage at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson)

Photo: Getty Images For Jameson

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Actor Johnny Depp performs as a guest guitarist onstage during the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson) less

Actor Johnny Depp performs as a guest guitarist onstage during the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images ... more

Photo: Getty Images For Jameson

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Actor Justin Bartha performs onstage singing 'Into the Great Wide Open' at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson) less

Actor Justin Bartha performs onstage singing 'Into the Great Wide Open' at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh ... more

Photo: Getty Images For Jameson

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Singer Ke$ha performs onstage singing 'Mary Jane's Last Dance' at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson) less

Singer Ke$ha performs onstage singing 'Mary Jane's Last Dance' at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty ... more

Photo: Getty Images For Jameson

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Musician Nick Valensi of The Strokes performs onstage singing 'American Girl' at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson) less

Musician Nick Valensi of The Strokes performs onstage singing 'American Girl' at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh ... more

Photo: Getty Images For Jameson

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Musician Harper Simon performs onstage singing 'The Waiting' at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson) less

Musician Cory Chisel of Cory Chisel and The Wandering Sons performs onstage singing 'You Don't Know How It Feels' at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson) less

Musician Cory Chisel of Cory Chisel and The Wandering Sons performs onstage singing 'You Don't Know How It Feels' at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los ... more

Photo: Getty Images For Jameson

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Singer/songwriter Nicole Atkins (L) and comedian Sarah Silverman perform onstage at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson) less

Singer/songwriter Nicole Atkins (L) and comedian Sarah Silverman perform onstage at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh ... more

Photo: Getty Images For Jameson

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Musician Jenny O. performs onstage singing 'Time To Move On' at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson) less

Musician Jenny O. performs onstage singing 'Time To Move On' at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty ... more

Photo: Getty Images For Jameson

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Singer Har Mar Superstar poses backstage at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson)

Singer Har Mar Superstar poses backstage at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson)

Photo: Getty Images For Jameson

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Actor Jesse Williams (L) and guest attend the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson)

Actor Jesse Williams (L) and guest attend the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson)

Photo: Getty Images For Jameson

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(L-R) Musician Albert Hammond, Jr. of The Strokes, Co-founder of The Best Fest Austin Scaggs, and actor Johnny Depp perform onstage at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson) less

(L-R) Musician Albert Hammond, Jr. of The Strokes, Co-founder of The Best Fest Austin Scaggs, and actor Johnny Depp perform onstage at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, ... more

Photo: Getty Images For Jameson

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Musician Ryan Miller of Guster poses backstage at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson)

Musician Ryan Miller of Guster poses backstage at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson)

Photo: Getty Images For Jameson

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Actor Jordan Masterson and actress Dakota Johnson attend the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson) less

Actor Jordan Masterson and actress Dakota Johnson attend the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For ... more

Photo: Getty Images For Jameson

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(L-R) Ryan Miller of Guster, musician Cory Chisel of Cory Chisel and The Wandering Sons, and Co-founder of The Best Fest Alex Levy perform onstage at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson) less

(L-R) Ryan Miller of Guster, musician Cory Chisel of Cory Chisel and The Wandering Sons, and Co-founder of The Best Fest Alex Levy perform onstage at the first ever Jameson Petty Fest West at El Rey Theatre on ... more

Photo: Getty Images For Jameson

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Eagles of Death Metal performs onstage at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson)

Eagles of Death Metal performs onstage at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson)

Photo: Getty Images For Jameson

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Musician Rodrigo Amarante performs onstage singing 'I Won't Back Down' at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images For Jameson) less

Musician Rodrigo Amarante performs onstage singing 'I Won't Back Down' at the first ever Jameson Petty Fest West at El Rey Theatre on November 14, 2012 in Los Angeles, California. (Photo by Imeh ... more

Photo: Getty Images For Jameson

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Kesha performs with Johnny Depp at Petty Fest

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Pop star Ke$ha took to the stage to perform with Hollywood actor Johnny Depp and the Black Keys drummer Patrick Carney at a Tom Petty tribute gig in Los Angeles on Wednesday night.

Petty Fest, an annual New York charity tribute to Tom Petty & The Heartbreakers, went to L.A. for the first time this week with acts on the bill including Carney, Nick Valensi and Fabrizio Moretti of The Strokes, funnywoman Sarah Silverman, and former Guns N’ Roses drummer Matt Sorum.

The show at the El Rey Theatre was packed full of surprises, including an appearance by Kings of Leon star Jared Followill, as well as Depp, who played guitar on a Petty track with a number of other musicians, including Ke$ha and Carney.

Ke$ha expressed her delight after the show by posting a picture of the ensemble performance on Twitter, writing, “Life is weird and magical. Just got off stage w/ (with) Johnny Depp and Patrick Carney. Wet dream? Nope. Real mutha f— life. Petty Fest.”

The New York show took place on October 24, and the L.A. leg features a second night on Thursday. All proceeds go to good causes, including the Sweet Relief Musicians Fund, which provides financial assistance to rockers who are struggling with illness, disability, or age-related problems.